Gas-burner.



' J. B. ANDBRSGN.

Patented Jan. 9, 1912.

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CDLQMBIA PLANOGRAPM'C0WASHI'NGTON, D. C

J'. B. ANDERSON.

K GAS BURNER. A.*PPLIGATION FILED AUG. 1e, 1911.-

Patented Jan. 9, 1912.

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ASSIGNOR OF ONE-FOURTH TO WILLIAM G. BOYLE, ONE-FOURTH TO JOSEPHGEI-IRING, AND ONE-FOURTH TO JOI-IN FUERSTENBERG, ALL VOF ALLEGHENYCOUNTY, PENNSYLVANIA.

GAS-BURNER.

Speccaton of Letters Patent.

Patented Jan. 9,1912.

Application filed August 16, 1911. Serial No. 644,412.

To all whom it may concern:

Be it known that I, JAMES B. ANDERSON, a citizen of the United States,and residing in the township of Shaler, in the county of Allegheny andState of Pennsylvania, have invented or discovered new and usefulImprovements in Gas-Burners, of which the following is a specification.

My invention consists of certain new and useful improvements in burnersfor either natural or artificial gas or other fluid fuel.

I show novel means for correlating the admission of both air and gasinto the mixing chamber so that the proportion of the one element to theother is maintained constant, as regulated, notwithstanding the degreeto which the valve mechanism of the burner is opened or closed.

I show a novel multiple needle valve structure which I use in connectionwith my burner, and means for controlling the same.

I show a plurality of my burners arranged in a battery and connected upfor simultaneous and automatic control. so that the temperaturepredetermined may be maintained without the constant watching of theoperato-r.

Other novel features of construction and arrangement will appear fromthe following description.

In the accompanying drawings, Figure 1 is a plan view of my burner; Fig.2 is a longitudinal section thereof along the line II-II in Fig. 1; Fig.3 is a cross sect-ion thereof along the line III-III in Fig. 2, thediaphragm being cut away to show the needle plate and the needle platebeing in turn cut away to show the operating lever, and Fig. 4t is adiagrammatic view showing a plurality of my burners, constructed inaccordance with the preceding figures, connected together forsimultaneous and automatic control, the thumb nuts and the ears beingomitted.

The following is a detailed description of the drawings. The burnercasing proper is composed of the gas chamber A, the valve box B and themixer C through which the mixture of gas and air is injected into thefurnace, not shown. 'The gas chamber A has a reduced outer end by whichit is connected to the source of gas supply, such as the pipe 1. Theends of the valve box B are threaded externally and engage respectivelythe internal threads on the ends of the parts A and C. The mixer C hasaV cylindrical base, and a tapered outer or discharge end to act as aninjector for the mixture.

Q is an internal shoulder in the butt of mixer C adjacent to the threadstherein.

3 is a diaphragm plate which' fits up against the shoulder 2 and is heldin place by the end of valve box B when the latter is screwed intoplace.` The diaphragm 3 is provided with a plurality of perforations 1-4preferably arranged in an annular series concentric with said diaphragm.

5 is a concentric stem and 6 an eccentric stem extending from diaphragm3 into the interior of element B.

7 is a needle plate, preferably having a solid circular center and arms8--8 extending radially therefrom, upon which arms are mounted theneedles 9-9, preferably tapered, which engage the perforations L1---4Vin the diaphragm 3. The plate 7 is provided with an axial stem 10 whichis provided with a longitudinal perforation `to accommodate the stem 5of the diaphragm 3 and a hole 11 is also provided through the plate 7engaged by the stem 6 to prevent ac cidental rotation of the plate 7 412 is a journal box cast or formed integral with the outer wal-l ofvalve box B and conimunicating therewith by means of a slot 13. But oneend of the box 12 is open and the rock shaft 141 extends thereinto, astutling box 15 being provided to prevent the escape of gas through theopen end of said journal box. An arm 16 is screwed onto the inner end ofshaft 111, which is threaded for that purpose, said arm extendingthrough said slot 13 into the interior of valve box B where it engages alateral recess 17 in the stem 10 of needle plate 7, said recess havingits top and bottom walls beveled toward the ends of the recess to permitthe arm 16 to rock freely. It is evident that the rocking of the shaft14. will correspondingly move the plate 7 and the needles 9%-9 in .theperforations 11-4 thus altering the discharge capacity of Vsaidperforations, and regulating the amount of gas admitted to the mixer C.

18 is a lock nut screwed up on shaft 1-1 against the arm 16 to hold itagainst rotation on the rock shaft.

19-19 represent longitudinal air ports in the butt of mixer C and 20 isa cylindrical shutter slidingly mounted on the butt of said element toregulate the admission of air through said ports into the interior ofmixer C.

21 is a rocking lever pivoted intermediate of its ends to the stud 22 onthe mixer C.

23 is a link pivoted at one end to one end of the lever 21 and at itsother end to a stud on the shutter 20.

24 is an arm mounted on the exposed end of rock shaft 14 and heldagainst rotation thereon by a set screw 25. 26 is a slot in the otherend of arm 24 in whichat any desired point may be locked the pin 27which is pivotally connected to the end of rocking lever 21. It is thusevident that by the above mechanism the movement of the shutter 2O forthe admission of air into the mixer C is correlated with the movement ofneedle plate 7 which controls the admittance of gas into the mixer C,and the proportion of air to gas is maintained constant. The proportionmay be adjusted by rotating the arm 24 on the rock shaft 14 and fixingit in its adjusted position by the set screw 25, or by moving the pin 27along the slot 26 and fixing it in its adjusted position.

To provide a convenient means for operating the mechanism which controlsthe shutter 20 and the needle plate 7, I prefer to provide the lever 24with a lateral projection 2S which is pierced by a threaded hole engagedby the threaded end of the thumb bolt 29 whose other end is held againstlongitudinal movement between the ears 30 30 on gas chamber A. It isevident that the rotation of the bolt 29 lwill raise or lower the lever24 and therefore will open and close the shutter 2O and adjust theneedle plate 7. A set screw 31 may be provided to prevent the accidentalrotation of bolt 29 in the projection 28.

As it is frequently desirable to operate a battery of burners inconjunction, I connect the operating mechanism of the same to a rod 32whose lateral pivot studs 33 engage holes 31--33a in lateral extension3434 on the arms 24`24, so that a longitudinal movement of said rod 32adjusts the shutters 2O and the needle plates 7 of the burnersV at oneand the same time and to the same deree.

g To provide automatic control for a battery of burners a device of anyconvenient type, operated by the temperature of the furnaceor boiler maybe connected up with rod 32 to actuate the same cutting down the supplyof mixed air and gas when the temperature rises beyond a predetermineddegree and increasing the same when the temperatu-re falls below saiddegree fixed upon. Thus in case of a steam boiler or steam boilers, Imay provide a steam cylinder 35 connected at its rear end by a pipe 36with the boiler. Under the influence of the steam admitted through thepipe 36 the piston 37 in said cylinder is forced forwardly against acoiled spring 38 whose other end bears against a plate 39 in thecylinder 35 and mounted on the end of the stuffing box 40 which isthreaded into the front end of the cylinder 35, so that by the movementof said stuffing box the tension of the spring may be adjusted. Thepiston rod 41 passes through said stuiiing box and is coupled up to therod 32. The spring 38 may be adjusted to any desired resistance, whichis overcome when the pressure in the boiler and conseqeuently in thecylinder 35 rises to a fixed degree, thus forcing the piston outwardlyagainst said spring and cutting down the amount of mixed air and gasadmitted through the burner or burners connected to rod 32. Then thepressure falls, the spring 3S overcomes the pressure in the cylinder andforces the piston rearwardly and restores the normal amount of air andgas admitted to the burners.

IVhere my burners are connected up with a rod 32 for simultaneousoperation, I prefer to unscrew and remove the thumb bolts 29, as shownin Fig. 4.

The thumb bolts 29 and the ears 30-30 are omitted from the burners inFig. 4 since they are not needed when the burners are automaticallycontrolled.

The advantages of my invention are manifold. Among them may be mentionedthe following. Convenient and inexpensive mechanism is provided forcorrelating the gas and air supplies; so that the flame is maintained ata constant degree of richness which can be changed at any time by meansof the adjustments provided to suit dierent characters of gas, &c. Themultiple needle structure enables me to siphon a larger amount of air into mingle with Vthe the use of a less quantity of gas than would berequired in the case of a single needle valve. The gas .is also admittedin finer particles over the area of the mixing cham- Y ber, enabling meto obtain a more intimate mixture and therefore a more effective andpowerful fuel. The pressure of the gas admitted through the plurality ofthe needle valves is greater than thatwith which gas from the samesupplyV would enter the mixing chamber through a single needle valve ofthe combined area of my plurality of valves. The quickly and accuratelyadjusted. Y A battery of my burners can be conveniently operated inunison and may be automatically con-V trolled by the temperature in thefurnace or boiler. This automatic control maybe applied to a singleburner if desired. A

What I desire to claim is 1. In a gas burner containing a mixing chamberprovided with air port-s and a Vgas gas by passage leading into thesame, a shutter adapted to close said ports, a multiple needle valve insaid passage, a common control for said shutter and saidA valve, wherebya predetermined ratio may be maintained between the gas and the air, andmeans for adjusting said control to vary said ratio.

2. In a gas burner, a multiple needle valve consisting of a perforateddiaphragm interposed in the gas passage, a plate mounted in said passageto slide longitudinally thereof, needles mounted on said plate andengaging the perforations in said diaphragm, a stem provided with anotch extending axially from said plate, a rock shaft mounted withoutthe gas passage, and an arm fixed to said rook shaft and extendingthrough the wall of said gas passage and engaging the notoh in saidstem,for the purpose described. 3. In a gas burner, a multiple needlevalve consisting of a perforated diaphragm interposed in the gaspassage, a plate mounted in said passage to slide longitudinallythereof, needles mounted on said plate and engaging the perforations insaid diaphragm, a gas tight journal box communicating with said passage,and a rock shaft journaled in said box and operatively connected withsaid plate, whereby the passage of gas through said perforations may becontrolled. 4f. In a gas burner containing a valve chamber and a mixingchamber which is provided with air ports through the wall thereof, aperforated diaphragm interposed between said chambers, a needle platemounted to slide longitudinally in said valve chamber, needles mountedon said plate and engaging the perforations in said diaphragm, a shutteradapted to oover said air ports, and common operative means `for movingsaid needle plate and said shutter in unison, whereby a predeterminedratio between the quantities of gas and air admitted to said mixingChamber is maintained.

5. In a gas burner containing a valve Chamber and a mixing Chamber whichis provided with air ports through the wall thereof, a perforateddiaphragm interposed between said chambers, a needle plate mounted toslide longitudinally in said valve chamber, needles mounted on saidplate and engaging the perforations in said diaphragm, a gas tightjournal box communicating with said valve chamber, a rook shaft mountedin said box, an arm rigidly attached to said shaft and extending intosaid valve chamber and connected to said needle plate, a shuttercontrolling said air ports, and operative connection between said rockshaft and said shutter, whereby said needle plate and said shutter aremoved in unison and a predetermined ratio is maintained between thequantities of gas and air admitted to said mixing chamber.

6. A plurality of gas burners, each burner Containing a valve chamberand a mixing chamber provided with air ports through the wall thereof, aperforated diaphragm interposed between said valve chamber and saidmixing chamber, a needle plate mounted to slide longitudinally in saidvalve chamber, needles mounted on said plate and engaging saidperforations, a rock shaft, an arm rigidly mounted on said rock shaftand extending through the wall of said valve chamber and engaging saidneedle plate, a shutter adapted to close said air ports, operativeconnection between said rook shaft and said shutter whereby they move inunison, and common Controlling means operatively connected with the saidoperative connection on each burner whereby all of said burners may beoperated in unison.

Signed at Pittsburgh, Pa., this 15th day of August, 1911.

JAMES B. ANDERSON.

Vitnesses:

E. A. LAWRENCE, Trios. E. FINLEY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

